公开(公告)号：US20220111464A1

公开(公告)日：2022-04-14

申请号：US17373123

申请日：2021-07-12

Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideaki MATSUOKA ,  Takashi ASADA ,  Tatsuyuki AMAGO ,  Kyosuke IZUNO ,  Koki NAKADA ,  Tomohiko SEKIGUCHI ,  Shuhei OGURA

IPC: B23K15/00 ,  B23K35/28 ,  B23K35/30 ,  B23K35/02

Abstract: A novel spot welding method for steel sheets and an aluminum alloy sheet, includes stacked sheet materials from a pair of opposing electrodes to join the sheet materials by resistance heating. The pair of opposing electrodes are in pressure contact with both outer surfaces of the sheet sets. The sheet sets include at least a first and second steel sheet, and an aluminum alloy sheet stacked in this order. A first energization step forms a molten pool between facing surfaces of the first and second steel sheets without melting the aluminum alloy sheet. A second energization step causes a melting reaction between facing surfaces of the second steel sheet and the aluminum alloy sheet. The first and second steel sheets are joined via a first nugget. The second steel sheet and the aluminum alloy sheet are joined via a second nugget including an intermetallic compound generated by the melting reaction.

公开(公告)号：US20210046585A1

公开(公告)日：2021-02-18

申请号：US17084698

申请日：2020-10-30

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Toru HIOKI ,  Shuhei OGURA ,  Hiroki TORIYAMA ,  Ryosuke KAWAI ,  Shun KATO

IPC: B23K26/242

Abstract: While a laser-beam application position is moved along a locus which circularly or elliptically circles around a locus center so as to cross a weld line that is a boundary between a first metal plate and a second metal plate overlapped with each other, the locus center is moved in a direction parallel to a weld line. A moving direction of the laser-beam application position is set such that the laser beam is first applied to the first metal plate and then to the second metal plate when the laser beam passes through an unmelted zone of the first metal plate and the second metal plate. The unmelted zone is located downstream of a range through which the laser beam has already passed in the direction parallel to the weld line.

公开(公告)号：US20160136756A1

公开(公告)日：2016-05-19

申请号：US14935002

申请日：2015-11-06

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shuhei OGURA ,  Kazuyuki OGUSU ,  Jyunichiro MAKINO ,  Hiroaki KISHI ,  Kousuke TSUJI

IPC: B23K26/06 ,  B23K26/21 ,  B23K26/70 ,  B23K31/12

CPC classification number: B23K26/0626 ,  B23K26/032 ,  B23K26/21 ,  B23K26/705 ,  B23K26/706 ,  B23K26/707 ,  B23K31/125

Abstract: A laser welding method is capable of easily restraining poor welding when spatters adhere to a protective glass of an optical system. The laser welding method includes a step of calculating a decrease-amount of the laser power before laser welding is performed by irradiating a welding portion of a workpiece with the laser beam having a predetermined power. The step of calculating the decrease-amount includes irradiating the welding portion with an inspecting laser beam having a power smaller than the predetermined power, receiving a return beam of the inspecting laser beam, measuring an intensity of the return beam, and comparing the intensity of the return beam with a standard intensity to calculate an amount of decrease in power of the inspecting laser beam at the welding portion.

Abstract translation: 激光焊接方法能够容易地抑制飞溅物附着在光学系统的保护玻璃上时的不良焊接。 激光焊接方法包括通过用具有预定功率的激光束照射工件的焊接部分来计算激光焊接之前的激光功率的减少量的步骤。 计算减少量的步骤包括用具有小于预定功率的功率的检查激光束照射焊接部分，接收检查激光束的返回光束，测量返回光束的强度，并且比较 返回光束具有标准强度，以计算在焊接部分处的检查激光束的功率的减小量。

公开(公告)号：US20160052091A1

公开(公告)日：2016-02-25

申请号：US14781129

申请日：2014-03-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Keisuke UCHIDA ,  Masashi FURUKAWA ,  Hiroomi KOBAYASHI ,  Atsushi KAWAKITA ,  Shuhei OGURA ,  Hiroaki KISHI ,  Eiji AKAMATSU ,  Yuta IWAMOTO

IPC: B23K31/12 ,  B23K26/03 ,  G01B11/30 ,  B23K26/21

CPC classification number: B23K31/125 ,  B23K26/03 ,  B23K26/21 ,  B23K26/24 ,  G01B11/30

Abstract: A welding laser beam (L1) is radiated along welding loci (C11, C12) set in workpieces (W1, W2), or an inspection laser beam (L5) is radiated along scanning loci (C51, C52) set in a molten pool (Y1) of the workpieces that are molten by radiation of the welding laser beam, a returned light beam (L2) including reflection light from the molten pool, vapor light caused due to melting and evaporation of the workpieces, and thermal radiation light emitted from the molten pool is received, and a welding state of a welded portion of the workpieces is inspected based on an intensity of a returned light beam received in a first region inside the molten pool which is relatively close to a given point and an intensity of a returned light beam received in a second region inside the molten pool which is relatively spaced from the given point.

Abstract translation: 焊接激光束（L1）沿着设置在工件（W1，W2）中的焊接轨迹（C11，C12）辐射，或者沿着设置在熔池中的扫描位置（C51，C52）辐射检查激光束（L5） Y1）通过焊接激光束的辐射而熔融的工件，包括来自熔池的反射光的返回光束（L2），由于熔融和蒸发而产生的蒸汽光，以及从 接收熔融池，并且基于接收在熔池内的第一区域中接收的返回光束的强度来检查工件的焊接部分的焊接状态，所述第一区域相对接近给定点，并且返回的强度 光束被容纳在与给定点相对间隔的熔池内部的第二区域中。

公开(公告)号：US20150266132A1

公开(公告)日：2015-09-24

申请号：US14660178

申请日：2015-03-17

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi KAWAKITA ,  Shuhei OGURA ,  Yuta IWAMOTO ,  Hiroaki KISHI ,  Nobuhiro IIJIMA

IPC: B23K26/03 ,  B23K26/24

CPC classification number: B23K26/032 ,  B23K26/22 ,  B23K26/24

Abstract: Provided is a laser beam welding apparatus capable of correctly detecting the beginning and the end of one welding point even in remote laser beam welding. The laser beam welding apparatus includes a head which irradiates a workpiece with a laser beam, an optical receiver which receives a reflected light of the laser beam from the workpiece, and a controller. The optical receiver receives only a laser beam and a plasma of the reflected light. The controller determines that one welding point begins when a time during which intensity of the reflected light is larger than or equal to a second set-intensity is longer than or equal to a first set-time, and determines that the one welding point ends when a time during which the intensity of the reflected light is smaller than or equal to a first set-intensity is longer than or equal to a second set-time.

Abstract translation: 提供了即使在远程激光束焊接中也能够正确地检测一个焊接点的开始和结束的激光束焊接装置。 激光束焊接装置包括用激光束照射工件的头部，接收来自工件的激光束的反射光的光接收器和控制器。 光接收器仅接收激光束和反射光的等离子体。 当反射光的强度大于或等于第二设定强度的时间大于或等于第一设定时间时，控制器确定一个焊接点开始，并且确定一个焊接点在 反射光的强度小于或等于第一设定强度的时间长于或等于第二设定时间。

公开(公告)号：US20250153279A1

公开(公告)日：2025-05-15

申请号：US18859051

申请日：2023-04-26

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shuhei OGURA ,  Tomohiko SEKIGUCHI ,  Kyosuke IZUNO ,  Yuki MATSUGI ,  Yasuaki OKITA ,  Mizuki KODAMA

IPC: B23K31/12 ,  B23K11/11 ,  B23K11/25

Abstract: A nugget diameter estimation method of a welded material bonded by resistance spot welding includes: a reference welding process of bonding a test material while measuring an expansion amount of the test material; a nugget diameter measurement process of measuring a nugget diameter of the bonded test material; a relational formula determination process of determining a relational formula between the measured nugget diameter of the test material and the expansion amount of the test material; a main welding process of measuring an expansion amount of the welded material, and bonding the welded material through energization while pressurizing the welded material with the pair of electrodes; and a nugget diameter estimation process of estimating a nugget diameter of the bonded welded material using the expansion amount of the welded material and the relational formula.

公开(公告)号：US20220297224A1

公开(公告)日：2022-09-22

申请号：US17649946

申请日：2022-02-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yosuke TAMADA ,  Kyosuke IZUNO ,  Tomohiko SEKIGUCHI ,  Shuhei OGURA ,  Chikaumi SAWANISHI

IPC: B23K11/11 ,  B23K11/25

Abstract: A welding determination method is provided, which determines whether a spot welding part is joined to an electrode without using resistance generated when separating the electrode from a workpiece. In the method, the workpiece made by laminating multiple metal sheets is clamped under pressure by a pair of electrodes and melted by a current applied, and after that the conduction is stopped to hold the workpiece in a pressurized state to determine whether the joining occurs. The method includes the steps of: deriving resistance between the pair of electrodes and pressurizing force by the pair of electrodes during conduction to the workpiece; and determining whether the spot welding part is joined to the electrodes based on a first index value calculated using the derived resistance and resistance in an ideal welding, and on a second index value calculated using the derived pressurizing force and pressurizing force in the ideal welding.

公开(公告)号：US20190275606A1

公开(公告)日：2019-09-12

申请号：US16294086

申请日：2019-03-06

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Koji NOMURA ,  Shuhei OGURA ,  Atsushi KAWAKITA ,  Naoya KATO ,  Toru HIOKI ,  Kenji FUKUSHIMA ,  Shun KATO ,  Takashi GOTO

IPC: B23K11/11 ,  B23K11/30 ,  B23K11/31

Abstract: Provided are a method and an apparatus for resistance spot welding in which preliminary current application is executed and then main welding is executed in accordance with master patterns of various parameters obtained during the preliminary current application. The main welding is executed under welding conditions of the master patterns, and whether a welding abnormality has occurred and whether the welding abnormality is likely to occur are determined. When the welding abnormality is likely to occur, the welding conditions for the main welding are corrected so as to prevent the welding abnormality. When the welding abnormality is unlikely to occur, the welding conditions for the main welding are corrected so as to match the master patterns.

公开(公告)号：US20150246413A1

公开(公告)日：2015-09-03

申请号：US14616869

申请日：2015-02-09

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi KAWAKITA ,  Shuhei OGURA ,  Hiroaki KISHI ,  Yuta IWAMOTO

IPC: B23K26/03 ,  B23K26/24 ,  B23K31/12 ,  G01J1/42

CPC classification number: B23K26/032 ,  B23K26/082 ,  B23K26/22 ,  B23K31/125 ,  G01J1/42

Abstract: A welded portion inspection method accurately identifies emitted light from a molten portion during inspection laser light irradiation, enabling reliable inspection. When transitioning from welding laser light irradiation to inspection laser light irradiation, the welding laser light irradiation is interrupted and then the welding laser light is switched to the inspection laser light. In inspecting a welded portion, two points in time at which the emitted light intensity is equal to or less than a certain threshold value are extracted from an intensity waveform of the emitted light as an inspection start point in time and an inspection end point in time. The interval between the inspection start and end points is estimated as being a irradiation period of the inspection laser light. The welded state is inspected based on the intensity waveform of the emitted light in the irradiation period.

Abstract translation: 焊接部分检查方法在检查激光照射期间精确地识别来自熔融部分的发射光，从而能够可靠地检查。 当从焊接激光照射到检查激光照射的过渡时，中断焊接激光照射，然后将焊接激光切换到检查激光。 在检查焊接部分时，从发射光的强度波形中提取发射光强度等于或小于某一阈值的两个时间点作为检查开始时间点和检查终点时间 。 检查开始和结束点之间的间隔被估计为检查激光的照射周期。 基于照射期间的发射光的强度波形来检查焊接状态。

公开(公告)号：US20240017345A1

公开(公告)日：2024-01-18

申请号：US18273074

申请日：2022-02-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shuhei OGURA ,  Tomohiko SEKIGUCHI ,  Shotaro KUROKAWA ,  Katsuhiro NAGASAWA ,  Hiroshi ADACHI ,  Daisuke YANAGIBASHI ,  Makoto AOYAMA ,  Keiichirou INAGAKI

IPC: B23K11/20 ,  B23K11/11 ,  B23K35/30 ,  B23K11/00

CPC classification number: B23K11/20 ,  B23K11/115 ,  B23K35/302 ,  B23K11/0066 ,  B23K2103/18

Abstract: A method for joining different kinds of metal materials includes: preparing a rivet, a plurality of metal members, and a first electrode and a second electrode, each having shanks and electrode portions provided at the tips of the shanks; sandwiching the rivet and the plurality of metal members between a first electrode and a second electrode; and embedding the rivet into the metal member by pressurization and energization using the first electrode and the second electrode. The preparation step includes preparing, as the first electrode and the second electrode, two electrodes that satisfy a condition in which each of electrical resistance values of the first and second electrodes is lower than or equal to a sum of an electrical resistance value of the plurality of metal members to be joined and an electrical resistance value of the rivet.